Riesel primes of the form 9•2ⁿ-1

Reserved! This sequence is currently reserved by: Dmitry Domanov

Current data

`k` , `b` :	9 , 2
Type :	3
Count :	48
Nash :	1674
Max `n` :	7,800,000
Date :	2024-08-10
Reserved :	Dmitry DomanovDmitry Domanov/Reserved

1^[1], 3^[2], 7^[3], 13, 15^[4], 21^[5], 43^[6], 63^[7], 99^[8], 109^[9], 159^[10], 211^[11], 309^[12], 343^[13], 415, 469, 781, 871, 939^[14], 1551^[15], 3115, 3349, 5589^[16], 5815, 5893, 7939, 8007^[17], 11547^[18], 12495^[19], 22555, 23647, 35647, 83415^[20], 103059^[21], 184999, 275859^[22], 384243^[23], 484975, 503893, 828709, 1010277^[24], 1419855^[25], 1481821, 2060941, 3259381, 4005979, 4683555^[26], 7479919

Remarks :

The sequence A002236 in OEIS
See also Williams 9•8ⁿ-1

Notes

History

2024-08-10: Checked to n = 7800000, Dmitry Domanov
2023-06-04: Found n = 7479919, Dmitry Domanov
2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
2020-10-29: Checked to n = 6500000, Dmitry Domanov
2020-08-23: Checked to n = 6350000, Dmitry Domanov
2020-03-11: Checked to n = 6000000, Dmitry Domanov
2015-11-03: Checked to n = 6000000, Dmitry Domanov
2015-05-06: Checked to n = 5700000, Dmitry Domanov
2014-12-24: Checked to n = 5220000, Dmitry Domanov
2014-09-29: Reserved by Dmitry Domanov for n=5000000-6000000
2013-01-07: Checked to n = 5000000, Peter Benson
2012-12-24: Found n = 4683555, Peter Benson
2012-11-17: Found n = 4005979, Peter Benson
2012-11-17: Reserved by Peter Benson from n=4000000
2012-03-17: Checked to n = 4000000, Peter Benson
2011-11-27: Found n = 3259381, Peter Benson
2011-11-01: Reserved by Peter Benson from n=3000000
2011-06-02: Checked to n = 3000000, Peter Benson
2011-04-05: Reserved by Peter Benson
2010-12-23: Checked n = 2105192? - 2106000, Predrag Minovic
2010-12-23: Checked n = 1840000 - 1968000, Larry Soule
2010-10-31: Checked to n = 1840000, Predrag Minovic
2010-09-05: Checked to n = 1814000, Predrag Minovic
2010-07-18: Checked to n = 1610000, Predrag Minovic
2010-06-05: Checked to n = 1570000, Predrag Minovic
2010-04-11: Checked to n = 1540000, Predrag Minovic
2010-02-11: Checked to n = 1530000, Predrag Minovic
2009-12-05: Checked to n = 1520000, Predrag Minovic
2009-11-24: Found n = 1419855, Predrag Minovic
2009-11-20: Checked to n = 1415000, Predrag Minovic
2009-11-03: Checked n = 1350000 - 1375000, 1400000 - 1414000, Adam Sutton
2009-11-03: Checked n = 1221088? - 1350000, 1375000 - 1400000, Predrag Minovic
2009-01-18: Checked n = 3499107 - 3563355, Peter Benson
2009-01-10: Checked n = 1330000? - 1430000?, Adam Sutton
2009-01-09: Checked n = 1430023 - 1454791, 1455171 - 1518147, 1652067 - 1810159, 1967643 - 2105191, 2366487 - 2406243, Peter Benson
2009-01-09: Checked n = 950000 - 1067108, 1140015 - 1221087, Peter Benson
2008-08-27: Found n = 2060941, Peter Benson
2008-04-12: Found n = 1481821, Peter Benson
2008-02-29: Checked n = 850000 - 1200000, Adam Sutton
2008-02-01: Reserved by Adam Sutton for n>1000000
2007-11-15: Found n = 1010277, Peter Benson
2007-04-07: Checked to n = 850000, Jeffrey Sax
2005-02-03: Found n = 828709, Jeffrey Sax
2005-01-16: Checked to n = 801000, Jeffrey Sax
2004-11-28: Checked to n = 744000, Jeffrey Sax
2004-07-24: Found n = 503893, Jeffrey Sax
2004-07-14: Found n = 484975, Jeffrey Sax
2004-06-13: Found n = 384243, Jeffrey Sax
2004-05-23: Found n = 275859, Jeffrey Sax
2000-04-03: Found n = 184999, Ingo Buechel, Wilfrid Keller
1999-02-14: Found n = 103059, Ingo Buechel, Wilfrid Keller
1999-01-15: Found n = 83415, Ingo Buechel, Wilfrid Keller
1998-06-16: Found n = 23647, Wilfrid Keller
1998-06-16: Found n = 22555, Wilfrid Keller
1989: Found n = 35647, Sergio Zarantonello, Joel Smith, Gene Smith, Bodo Parady, Landon Curt Noll, John Brown
1981: Found n = 12495, Anders Björn, Hans Riesel
1980: Found n = 8007, Jurgen Buhl, Walter Borho
1980: Found n = 7939, Jurgen Buhl, Walter Borho
1980: Found n = 5893, Jurgen Buhl, Walter Borho
1980: Found n = 5815, Jurgen Buhl, Walter Borho
1980: Found n = 5589, Jurgen Buhl, Walter Borho
1980: Found n = 3349, Jurgen Buhl, Walter Borho
1979: Found n = 11547, Jurgen Buhl, Walter Borho

[1] Twin n=1

[2] Twin n=3, Williams 9•8¹-1

[3] Twin n=7

[4] Williams 9•8⁵-1

[5] Williams 9•8⁷-1

[6] Twin n=43

[7] Twin n=63, Woodall 9•128⁹-1, Williams 9•8²¹-1

[8] Woodall 9•2048⁹-1, Williams 9•8³³-1

[9] Woodall 18•64¹⁸-1

[10] Williams 9•8⁵³-1

[11] Twin n=211

[12] Williams 9•8¹⁰³-1

[13] Woodall 18•524288¹⁸-1

[14] Woodall 72•8192⁷²-1, Williams 9•8³¹³-1

[15] Williams 9•8⁵¹⁷-1

[16] Williams 9•8¹⁸⁶³-1

[17] Williams 9•8²⁶⁶⁹-1

[18] Williams 9•8³⁸⁴⁹-1

[19] Williams 9•8⁴¹⁶⁵-1

[20] Williams 9•8²⁷⁸⁰⁵-1

[21] Williams 9•8³⁴³⁵³-1

[22] Williams 9•8⁹¹⁹⁵³-1

[23] Williams 9•8¹²⁸⁰⁸¹-1

[24] Williams 9•8³³⁶⁷⁵⁹-1

[25] Williams 9•8⁴⁷³²⁸⁵-1

[26] Williams 9•8^1561185-1

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Riesel primes of the form 9•2ⁿ-1

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Riesel primes of the form 9•2n-1

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Riesel primes of the form 9•2ⁿ-1